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A bag contains 5 red balls and some b...

A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball is double that of a red ball, find the number of blue balls in the bag.

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RD SHARMA-PROBABILITY -All Questions
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  2. If number x is chosen fromthe numbers 1,2,3, and a number y is selecte...

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  3. A bag contains 5 red balls and some blue balls. If the probability ...

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  4. A bag contains 12 balls out of which x are white. If one ball is...

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  5. Cards marked with the numbers 2 to 101 are placed in a box and mixe...

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  6. Cards marked with the numbers 2 to 101 are placed in a box and mixe...

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  7. 1000 tickets of a lottery were sold and there are 5 prizes on these...

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  8. A child has a block in the shape of a cube with one letter written ...

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  9. Savita and Hamida are friends. What is the probability that both wi...

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  10. There are 40 students in class X of a school of whom 25 are girls a...

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  11. A carton consists of 100 shirts of which 88 are good, 8 have minor ...

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  12. Gopi buys a fish from a shop for his aquarium. The shopkeeper takes...

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  13. A piggy bank contains hundred 50 paise coins, fifty Rs. 1 coins, twent...

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  14. A game of chance consists of spinning an arrow which comes to rest ...

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  15. A game consists of tossing a one rupee coin 3 times and noting its ...

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  16. If a number x is chosen at random from the numbers -2,\ -1,\ 0,\...

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  17. A jar contains 24 marbles some are green are others are blue. If a ...

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  18. The probability that it will rain tomorrow is 0.85. What is the pro...

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  19. A die is thrown. Find the probability of getting: (i) a prime nu...

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  20. A die is thrown. Find the probability of getting: (i) an even pr...

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